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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef DOM_SVG_SVGPATHDATAPARSER_H_
#define DOM_SVG_SVGPATHDATAPARSER_H_
#include "mozilla/Attributes.h"
#include "mozilla/gfx/Point.h"
#include "SVGDataParser.h"
namespace mozilla {
class SVGPathData;
////////////////////////////////////////////////////////////////////////
// SVGPathDataParser: a simple recursive descent parser that builds
// DOMSVGPathSegs from path data strings. The grammar for path data
// can be found in SVG CR 20001102, chapter 8.
class SVGPathDataParser : public SVGDataParser {
public:
SVGPathDataParser(const nsAString& aValue, mozilla::SVGPathData* aList)
: SVGDataParser(aValue), mPathSegList(aList) {
MOZ_ASSERT(aList, "null path data");
}
bool Parse();
private:
bool ParseCoordPair(float& aX, float& aY);
bool ParseFlag(bool& aFlag);
bool ParsePath();
bool IsStartOfSubPath() const;
bool ParseSubPath();
bool ParseSubPathElements();
bool ParseSubPathElement(char16_t aCommandType, bool aAbsCoords);
bool ParseMoveto();
bool ParseClosePath();
bool ParseLineto(bool aAbsCoords);
bool ParseHorizontalLineto(bool aAbsCoords);
bool ParseVerticalLineto(bool aAbsCoords);
bool ParseCurveto(bool aAbsCoords);
bool ParseSmoothCurveto(bool aAbsCoords);
bool ParseQuadBezierCurveto(bool aAbsCoords);
bool ParseSmoothQuadBezierCurveto(bool aAbsCoords);
bool ParseEllipticalArc(bool aAbsCoords);
mozilla::SVGPathData* const mPathSegList;
};
class SVGArcConverter {
using Point = mozilla::gfx::Point;
public:
SVGArcConverter(const Point& from, const Point& to, const Point& radii,
double angle, bool largeArcFlag, bool sweepFlag);
bool GetNextSegment(Point* cp1, Point* cp2, Point* to);
protected:
int32_t mNumSegs, mSegIndex;
double mTheta, mDelta, mT;
double mSinPhi, mCosPhi;
double mRx, mRy;
Point mFrom, mC;
};
} // namespace mozilla
#endif // DOM_SVG_SVGPATHDATAPARSER_H_
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